Valve-truing device



0. 8. 10m AND 0. w. SPENCEQ.

VALVE mums DEVICE.

APPLICATION FILED SEPT. 22, 1919.

1,342,632. te e n 8, 1920.

' INVENTORS OSCAR B 1 JONES DAVID W. SPEHCE UNITED STATES PATENT OFFICE.

OSCAR B. JONES AND DAVID W. SPENCE, OF COLUMBUS, OHIO.

Application filed September 22, 1919.

To all whom. it may concern:

Be it known that we, Osoan l3. JONES and DAVID W. States of America, residing at Columbus, in the county have invented certain new and useful Improvements in Valve Truing Devices, of which the following is a specification.

Our present invention relates generally to valve grinding devices and more particularly to machines for truing valves, our object being the provision of a simple inexpensive apparatus which, while adapted to shop and garage use is especially desirable for home use.

A further object of the invention is the provision of a simple compact machine of this type free of all complications and adaptable to valves of various sizes.

A still further object is the provision of a manually actuated valve truing device which may be readily and quickly set to the particular valve in hand and by means of which accurate truing may be readily and quickly accomplished.

In the accompanying drawing which illustrates our present invention and which forms a part of this specification Figure 1 is a front elevation of our improved machine,

Fig. 2 is a vertical transverse section taken substantially on line 22 of Fig. 1,

Fig. 3 is a side elevation, and

Figs. 4 and 5 are side views, the latter being partly broken away, of the operating handle or the crank.

Referring now to these figures, our invention proposes a machine, the several major portions of which are rigidly mounted upon a single supporting base 10 which may, in order that it can be readily secured to a work bench or other support, have side notches 11 for the reception of supporting screws.

Rising from the baselO is a bracket 12 disposed parallel to the longitudinal axis of the base with a pair of lengthwise spaced legs 13 and 14, the latter immediately adj acent to one end of the base 10, as clearly seen by reference to Fig. 1. These legs are preferably reinforced by webs 15, the web of the bracket leg 14 having a rectangular notch 16 for a purpose which will be presently described.

Above its center the bracket 12 has a lat- Specification of Letters Patent.

SPENCE, citizens of the United' of Franklin and State of Ohio,

Patented June 8, 1920. Serial No. 325,356.

erally projecting threaded bearing 17 for a vertical adjusting screw 18, provided with an upper cross bar 19, forming a handle and having its lower end in rotatable connection with the center of a vertically adjustable bridge piece 20. The opposite ends of the bridge piece 20 support half bearings 21 which cooperate with somewhat similar half bearings 22 mounted upon the bracket 12 above the upper ends of its supporting legs 13 and 14, which latter open upwardly and with the bridge 20 elevated are adapted to receive the stem 23 of a valve disk 24 shown in dotted lines in operative relation to the parts in Fig. l.

Vith the valve stem 23 in position in the half bearings 22 of the bracket, the bridge 21 may be lowered so that the V-shaped bearing faces will operate to effectively hold the valve stem in rotatable relation and permit of itsrotative movement with minimum friction. lVith the valve stem so disposed, the valve disk projects to one side of the bracket 12 beyond its leg 13 which latter has a horizontally disposed shoulder 25 spaced above the base 10 so as to receive the lower edge of a cutter 26 held in place by a bolt 27 through the leg 13 above shoulder 25, this cutter 26 having an elongated inclined cutting edge at 28 projecting beyond the leg 13 to receive the inclined face of the valve disk 24 thereagainst.

The valve stem and valve disk associated with the supporting parts of the machine and in proper relation to the cutter as above described, may be rotated by an operating handle or crank 29 having a bearing aperture at one end to receive the free end of the valve stem 23 and having a set screw 30 associated with its said end to securely clamp the valve stem, and the notch 16, before mentioned, of the leg 14 is preferably so proportioned as to receive the head of the set screw 30 and thus avoid the necessity of having a wrench at hand for this purpose.

At one end of the base 10 a standard 31 rises and is preferably supported by a web 32, this standard having at its upper end an internally threaded bearing 33 axially alined with the bearings formed by the half bearing pieces 21 and 22. The bearing 33 receives an adjusting screw 34 having an outer milled head 35 forming a handle and having at its inner end a relatively rotatable concavo-convex pressure plate 36 for engagement with the outer face of the valve disk 24:, in order to adjust the latter against the cutting edge 28 of the cutter 26.

It is therefore, obvious that it is simply necessary upon removal of a valve and valve stem for truing or facing that the crank 29 be first associated with the free end of the valve stem and the said stem then disposed in the half bearings 22 of the upright bracket 12. The bridge 21 is then lowered into engagement with the valve stem and adjusted at desired pressure, and the adjusting screw 34 is rotated to bring the valve disk against the cutter edge 28 with the desired pressure. By then grasping the crank handle and rotating the valve stem and disk, it is obvious that the facing operation may be quickly accomplished.

. virtue of the elongation of the inclined cutter edge 28, as well as the adjustment capabilities of screw 34 and the frame bearingsfor the valve stem, valves of various sizes may be accommodated, smaller valve disks of course engaging a different portion of the cutter edge than larger valve disks.

It is obvious that the frame bearings for the valve stem will accommodate stems of various diameters throughout a considerable range and the crank 29 may likewise be formed with an enlarged stem receiving opening 37, terminating in a V-shaped recess so that valve stems of varying diameters may be received thereby, as will be apparent upon comparison of Figs. 4 and 5.

VOur invention thus provides a simple inexpensive machine, adapted alike for shop,

garage and a flat face above the ledge, a cutter secured to the flat face to rest on the ledge and having a cutting edge projecting laterally beyond oneside of the frame, said frame having an uppercentral extension terminating in a horizontally projecting bearing piece, an adjusting screw threaded vertically through said bearing'piece and'having an upper handle, a bridge member swiveled at its center on the lower end of the adjusting screw and having downwardly facing half bearings at its opposite ends opposing the said half bearings of the frame, a bracket rising from the base in spaced relation to the cutter side of the said frame and having a hearing at its upper end alined with the said half bearings, and an adjusting screw threaded through said bracket bearing, having a handle at its outer end and having a swiveled valve engaging head at its inner end for the purpose described.

In testimony whereof we aflix our signatures. V

OSCAR B. JONES. DAVID W. SPENCE. 

